Automatic fuel-oil superheater



May l, 1928.

' G. BAKER AUTOMATIC FUEL OIL SUPERHEATER Filed May 24, 1927 ATTORNEYSing the fuel oil, either singly or in combi- Patented May l, 1928.

^ #UNITED STATES utrua GEORGE aucun, or SEATTLE, wasnnafron.

Auronrrc FUEL-on. annuals'.HEATER.v

Application ma my 24, 1m. semi En. 193,877@

5 fuel to be used in a furnace for the purpose of heating water andgenerating steam, my invention particularly applyln to hot water andsteam heating systems. further object -,of the invention is to utilizethe hot water and steam of the system for pre-heatnation. A furtherobject of the invention is to provide means whereby the hot water 1skept circulating around 'a fuel c ondult for re-heating the fuel a longtime after the urnace itself has been disconnected from the fuel sup ly.

Further o jects and advantages of my 1nvention will appear as thespecification proceeds.

The preferred form of my inventlonl 1s illustrated in the accompanyingdrawing which shows diagrammaticallyl the entire stem in side elevation.While I have shown only the preferred form of the invention, I wish tohave it understood that various changes or modifications may be madewithin the scope of the claims hereto attached without departing fromthe spirit of the invention.

Referring to the drawing in detail, it will be seen that fuel oil issupplied to the furnace 1 from a fuel oil reservoir 2 through the pipe3, a pipe 4 being provided for returnmg fuel not used.' The furnace issuitably constructed for heating water and for generating steam, and thesteam is guided to a heating system through the pipe 6 and "\\isreturned from the heating system through e pipe 7. The heating systemitself is not fown in the drawing. The hot water is 'conducted to astorage tank (not shown) through the pipe 8 and returned from thestorage tank through the plipe 9.

The ipe 3 presents a orizontal section 11 whic passes through acylindrical retort 12, suitab e unions 13 bein provided for facilitatingthe assembly an packing means 14 for rendering the fit steam andwatertight. Hot water is taken from the pipe 8 and is conducted througha pipe 16 to one end of the retort 12 while the other end of the retort12 is connected through a pi 17 with the furnace, so that water may,reely circulate through the retort and return to the boiler in thefurnace. A valve 18 controls the pipe 16 and a valve 19 controls thepipe'17.

The pipe 7, being the return steam pipe, is connected through a-pipe 21to the retort 12 and includes an expansion chamber 22 rising verticallyfrom the retort. The expanslon chamber is provided with an automatic airrelief valve 23 at the end of a pipe 24 connected to the lower end ofthe expanson chamber. A valve 26 controls the pipe 21. A suitable draincock 27 is pro- 'vided at the bottom of the retort 12 and a thermometer28 allows the temperature within the retort to be established.

In usin my system it is apparent that the 'oil be ore it reaches thefurnace'is preheated by passing through the retort 12. Water passes fromthe pipe 8 through the pipe 16 and the retort, for pre-heatin the oilflowing through the pipe 11 an the water returns through the pipe 17.Steam is conducted through the pipe 21 and the expansion chamber 22 intothe retort and also returns through `the pipe 17. When the steam entersthe expanslon chamber 22 it rst drives the air out of the said chamberthrough the relief valve 23. When 4 the fuel supply is turned olf,generation of steam is discontinued and the steam in the chamber 22condenses and creates a vacuum which draws on the heated water in theretort 12 and causes the retort to ebb back and forth for a numberof'hours after the furnace has :been disconnected. The arrangement ofthe valves allows either steam or water to be used singly forpre-heating the oil or in combinatmn.

' I claim:

1.In combinatipn, a furnace for heating" water and generating steam, apipe for feeds.

' ing heated water and the steam indepen entconducting means and adaptedto be evacuc ated thereby for producing a vacuum when water throu h'theretort, independent means the steam condenses and for causing the forconductmgsteam throu h the retort inwater to pulsate back and forth.cluding an expansion cham er rising from l0 2. In combination, a furnacefor heating the retort and mdependent control means for 5 water andgenerating steam, a pipe for feedthe water and steam conducting means.ing fuel oil to the furnace, a retort surround- 1 i l ing said pipe,means or conducting hot GEORGE BAKER.

